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We have 750KVA DG set, we want to introduce REF relay with 1250/1A,CL PS,Current transformers.The lead distance of 2.5mm copper flexible cable from CT to relay is around 5mtrs.We would like to know the knee point votage(VK) & IM calculion for CT's
1880what do you mean by the "bay" in a switchyard? how to determine exact number of bays in a substation?
8 69692my question is that....few days ago i had installed a three phase motor starter for an electric saw.the motor will run and make the hydraulic pressure which will be goes to pressure cylender by up and down lever.two number of limitswitches are also installed on cylinder for safety of motor.now when the arm of cylinder reaches to the upper or lower limit it will cut the motor's line.and motor will be stop.now wana know that what will i do that motor runs continue after the limitswitch cut it down but it shold not be made any pressure.pls answer me in brief.
3 4567I want to calculate how much capacitor we connect to maintain the unity power factor? Is there any formula? Pls give me the answer
1879Among the following Which is vector quantity? a. Flux b. permitivity c. flux density d. magnetic intensity
2 4657I HAVE A INCOMING 100A MCCB TPN 25KA, CABLE LENGHT OF 80M 70MM CABLE SIZE FROM MAIN SUBBOARD TO NEW DB.BASE ON THE FAULT LEVEL SETTING OF 45KA.I WOULD LIKE TO FIND OUT 25KA ENOUGH KA. APPRECIATE IF SOMEBODY CAN ASSIST ME WITH FORMULA FOR THIS. FRM: JEFF
3994Post New Electrical Engineering Questions
What is the one main difference between ups & inverter ? And electrical engineering & electronics engineering ?
which mm cable should be used for 1.hp immersible pump motor for the distance of 330 metres?
What is the minimum distance to be maintained in between HT panel and LT panel and Instrument panel as per IEC and NEC standards?
specify the inbuilt protections in DG
What are the basic & Majour problems in UPS ?
our industries ht line so power fluctation(once drop of power please rectify causes
Dear All, I am new in construction company , my boss ask a question at time of interview , If we have 60MW generation and Single Power Transformer step-up we have. if CMR 50/60MVA , ONAN, ONAF respectively , is it sufficient or not ? for that much power to transfer,
which type of cabel
how 650 volts creates? where is use?
What is the reason of polyphase induction motor tripping suddenly on high current during running at 70% laod? Motor IR , winding resistance & inductance balance. Motor no load current is balance and ok as per mgfr. data.
How can i get my certificate of competency as an electrical supervisor? I have complicated my B.Tech from Uttarakhand technical university this year (2012).
WHAT ARE THE DATAS REQUIRED FOR PROTECTION AND METERING AND CONTROL AND LOGIC PREPARATION,HOW TO STUDY THE PROTECTION AND METERING?
what is load vs Torque curve & why it is used?
what is the difference between directional & non directional earth fault with example please explain.
why d.c produces corrosion
